The film is being directed by John Wick co-helmer David Leitch after the first film's director Tim Miller abandoned the project over creative differences.

The original Deadpool was a box-office smash taking in $783 million worldwide to become the highest grossing R-rated film of all time.

Dark Phoenix meanwhile is set to release on Nov. 2, 2018.

The announcement confirmed that the new film in the mainline X-Men series will tackle the Phoenix Force that inherits Jean Grey's (Sophie Turner) body following the events of X-Men: Apocalypse in which the powerful mutant was seen tapping into her hidden power.

Jean Grey's transformation into the Phoenix was also the subject of 2006's X-Men: The Last Stand which was changed following the events of 2014's time-bending X-Men Days of Future Past.

Turner had previously mentioned that she would returning to filmX-Men soon following production on Season 7 of Game of Thrones.

Spinoff New Mutants will be releasing first ahead of Deadpool 2 and Dark Phoenix on April 13, 2018.

Directed by Josh Boone, the film will follow a new, younger cast of mutants that will include characters such as Wolfsbane, Mirage, Cannonball, Sunspot, Magik, and Warlock.